Mountable holder



FIG. 1 is a top elevational view of a mountable holder;

FIG. 2 is a front elevational view thereof, the rear elevational view being a mirror image thereof;

FIG. 3 is a left-side view thereof, the right-side view being a mirror image thereof;

FIG. 4 is a top perspective view thereof;

FIG. 5 is another top perspective view thereof, shown in an alternate position;

FIG. 6 is yet another top perspective view thereof, shown in another alternate position;

FIG. 7 is a bottom perspective view thereof;

FIG. 8 is another bottom perspective view thereof, shown in an alternate position; and,

FIG. 9 is yet another bottom perspective view thereof, shown in another alternate position.

Structure and environment shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for a mountable holder, as shown and described. 